E126-P-EL
User Manual
FW_E126-P-EL_M_v0301-01_EN
Page 39
Action
Result
Notice
Press the PROG button for at
least 7 seconds
● The
SETUP
indicator comes on
continuously
● SETUP menu 1 shows
After a few seconds, the
backlight goes off. This is
normal behavior to save battery
power.
Press CLEAR
SETUP menu 2 shows
Press SELECT
SETUP menu 21 shows
Press and hold PROG for at
least 3 seconds
The display goes to the
OPERATION menu and the
RUN
icon is displayed
The unit is ready for use
Check the process accuracy
Re-calibration of the flowmeter
might be necessary
Do not forget to re-enter any
subsequent K-factor alterations
6.3
MECHANICAL INSTALLATION
6.3.1
INSTALLATION PRECAUTIONS
Please adhere to the following instructions and conditions:
Explosion hazard: The painted aluminum unit must be installed and maintained as follows to
avoid danger of ignition due to electrostatic discharge:
● Use only in fixed installations.
● Do not place unit in areas with rapid airflow.
● Clean only with a moist cloth.
Seal conduits / enclosure
● For FM Group A,B,C,D: “SEAL ALL CONDUIT ENTRIES WITHIN 18 INCHES”.
● For CSA Group B,C,D: “SEAL ALL CONDUIT ENTRIES WITHIN 18 INCHES”.
● For CSA Group A: “SEAL AT ENCLOSURE WALL”.
Use certified cable glands and conduit sealing devices.
All flameproof joints are designed for:
● Volume: 500 cm³ < V ≤ 2000 cm³.
● Group IIC enclosures.
Flameproof joints
The E126-P-EL has 4 flameproof joints:
● Cement between glass and cover (length ≥10 mm)
● Thread between body and cover: M100x1.5 (8 full threads engaged)
● Thread for conduit opening left and right:
○ M20 x 1.5, M25 x 1.5, (8 full threads engaged)
○ ½ NPT, ¾ NPT
● Thread for process opening:
○ M20 x 1.5, M25 x 1.5 (8 full threads engaged)
○ ½ NPT, ¾ NPT, 1 NPT
● All metric threads comply with fit class 6g/6H (ISO 965-1 + 965-3)
● All NPT threads comply with ANSI/ASME B1.20.1.
Connecting enclosures
Only connect the E126-P-EL to another Ex-d enclosure when the following conditions are satisfied:
● The part used to connect the two volumes is Ex-d certified.
● The connected enclosure is Ex-d certified for its own internal electrical equipment (i.e. pickup
coil or other sensors).
● The volume of empty space inside this added volume must not exceed 13.5 cm
3
.
● The extra enclosure may not generate any heat.
● The E126-P-EL is certified for a maximum permitted electrical energy; the extra enclosure may
not add any electrical energy.
